I think it is the greatest, both in extension and population than any other Empire in history.
Hi! Spion, that's absolutelly right: Here is the first empires of whole history 1. British empire 33,6 millions km2 and 458 millions of people under its dominion. 2. Mongol empire 3 millions km2. 3. And finally Russian empire 22,8 millions km2. Best regards.